Drill



Nov. 2 1926.

B. B. DUDLEY Er AL DRILL Filed Dec. 26. 1923 Patented ov. 2, 1926.

UNITED STATES 1,605,331l .PATENT OFFICE.

BENJAMIN B. DUDLEY, OF VISALIA, AND EDWARD R, DUDLEY, OF PIEDMONT,

7 CALIFORNIA.

DRILL.

Application led December 26, 1923. Serial Ita-682,763.

The present invention relates to improve ments in'drills such asare used for the boring of wells or the like and has particular reference to a. reciprocating drill of the character described. It is particularly proposed in the present invention to show a construction in which a reciprocating drill bit cooperates with the casing in regulating the iow of water which is admitted under pressure through the bit to the surface attacked by the bit. The details of construction and further advantages of our device will appear as the specification proceeds.

The preferred forms of our invention are illustrated in the accompanying drawing in which Figure I shows a. vertical section through one form of our drill, while Figure II shows a vertical section through a second form of drill. While we have shown onl the preferredl forms of our invention, it sliould be understood that 4various changes or modications may be made within the scope of the claims hereto attached without departing from the spi rit of the invention.v f In the form illustrated in Figure I, our

drill bit (1) which may be of any conventional form, is threaded into the lower end of a piston' (2), as shown at (3). The latter piston is in threaded engagement with a series of tools or-connecting members of which only one is shown, which in the trade is known as a jar (4f). The series of tools connect with a suitable means for reciprocating the pist-on which is not shown in the drawing since it is well known in the art.

The piston reciprocates in a casing (6) which latter is unsupported at its lower end as indicated, the casing being suspended from its upper end by any suitable means 4o not shown, and successively lowered as the way is cleared for the same by the bit. The piston is provided with suitable piston rings (7) engaging the inner wall of the casing and making a water-tight connection with the same. The bit is perforated vertically, as shown at (8) and holes (9) are provided in the top of the piston, allowing water introduced into the casing to pass through the pistonand the perforations (8) in the bit to the bottom of the well, so as to loosen and wash away the soil formation as the same is cut up by the drill in operation.

The principal idea -of the present invention is the provision of the piston which guides the water introduced under pressure into the casing 6 for passing through the drill bit to return on the outside of the caslng so as to constantly wash out a clear space around the casing and to allow the casing to descend when lowered from above as the wellis deepened, the dbris being forced up on the outside of the casing.

The same idea is carried out in vthe form shown in Figure II, in a slightly different manner. Here the bit (1a) is screwed into a connecting member (11), which latter is secured to a series of tools of which only one (12) is shown in ,the drawing. The connecting member (11) is provided with a collar (13) at its upper end and is hollowed, as is shown at (14) to permit water under pres sure to be carriedv to the bottom of the well through a nozzle (16) in the drill bit. A cylindrical member (17) of-lexible material is provided in the casing (18), and allows.

the connecting member (11) to reciprocate therethrough, while making water-tight connection with the said connecting member, as well as with the inside of the casing, so as to prevent water from rising within the casing. When connecting member (11) reciprocates during the operation of the drill, the collar (13) strikes the fieXible member (17) and gradually forces the same downwardly relative to the casing 18 at the same rate of speed at which the well is deepened.

The principal idea of this form again is to allow water to belintroduced into the casing under pressure and to enter into the bottom of th-e well through the hollow connect-l ing member (l1) and the nozzle (16), so as to wash away the dbris and to force the Same to the outside of the casing for' discharge at the top of the well and to provide a clear hole for the lowering of the casing and drill bit as the work progresses.

We claim:

1. In a well boring outfit a casing extending into the bore hole and'spaced therefrom, a drill reciprocable within the casing and having a tubular connecting stem of reduced diameter, a packing ring fitting within the casing surrounding the reduced Stem frictionally slidable both on the reduced stem and within the casing, and meansfor directing water from within th'e casing above the ring through the drill for' overflow outside of the casing. f

2. In a well boring outfit a casing extending into the bore hole and spaced therefrom,

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a drill reciprocable Within the casing and having a tubular connecting stem of reduced diameter, a packing ring itting Within the casing; surrounding the reduced stem frictionally slidable both on the reduced stem and Within the casing, means for directing water from Within the casing above the ring through the drillmfor overflow outside of the casing, and means actuated by reciprocation of the drill for progressively forcing said ring downwardly relative vto the casing as the liole is deepened.

BENJAMIN B. DUDLEY. EDWARD R. DUDLEY. 

